[  505.187881] bond0: (slave eth0): making interface the new active one
[  505.187971] bond0: (slave eth0): Enslaving as an active interface with an up link
[  509.350554] bond0: (slave eth0): Releasing backup interface
[  509.416917] bond0: (slave eth0): Enslaving as an active interface with an up link
[  513.577445] bond0: (slave eth0): Releasing backup interface